Self-locking spring



June 9, 1925.

A. KRAKAUER SELF LOCKING SPRING Filed Dec. 12, 1925 INVENTOR Abra/lam Kra/rauer 'ITORNEY To whom 2'22 may concern: [1

7 up the seat.

mg" t S ri Patented June 9, 1925.'

ABRAEAM KR KAUER, on new yoaxsn." Y." i

, SELF-LOCKING sa e.

Application filed December Be it known that I, A RAHAMQKRAKAU R, a citizen of the United States, r'esidingat "the city of New York, in the county of Kings and State ofNew York, have invent,- ed certain new and useful Improvements in Self-Locking Springs; of which the follow ing is a specification o v t It This invention relates to spring-seats for furniture and particularly to thejmeans for lockingthe seat springs in place.

It is usual in furniture seats to provide ameml cross hung from. thefframe of the piece of furniture for the purpose of supporting The means heretoforegused for securing thesprings to saidycros bafhave proven unsatisfactory, in gthata number-of said springs often become disengagedi from the support therefor, and are consequently lost a for, displaced either in ftransit, in handling or in use, V i a i It is one of objects o f' fmy invention to I proyide simple buteflicient means for lock-"1. place against displacet n entorremoval. V r I Afurther object of this invention islthe provision of self locking means capable-0f rapid and economical manufacture andas- 'sembly for efiectivelysecuring a springto a bar.

vA still further object o f this invention is the provision of means for locking a spring in position at any de'sire'd jpoint in-"a cross bar. i q j? "To attain thefaforesaid and other objects as will appear'in, theodescription which: fol I lows, I employ the arrangements and combinations ofparts shown in the preferred forms .in the accompanying drawings, in:

f which-y t modified form of the spring" Fig. 1 is a front elevationof' the preferred form of my inyention showing a' cross 513511 with lainumber of springssecured thereto. 1 g Fig. 2 isabottom plan viewof thesame.

Fig. 3Uisj a front elevation; similarfto Fig. 1, illnstratingthe manner in which the springs may efsecuredto the crossbar at any desiredpointthereof.

"Fig. j at a is affrontfelevationfshowing a p A ,locklngrmeans. Fig, '5 is a vertical sectonof the same. on

a Fig" :6 is a ew s mi f a row of the springs which make I v l typeis secured to said icross-bar and it is fonand themanneri of securing a it sald, springs to the'cross bar which isthe wherein fF g- Shaw- 1823. Serial No. QSQOSfii J i if "fits a bottom a F g. 8 safront 'viewof still; another .form of spring lock ngmeans;

the pr acticall embodiment, of niy iin 'ventlon, the crossgbar lO isf' suitably hung I from the frame of a pieceof furniture in the nsualmanner as by meansof theiflanges and 12 at the ends of said crossbar. I'prefer to make the cross section of said cross bar-10 substantiallyin the form of an view of; thesam'e, 1

inverted blunt V, two of the sides; of said V forming; the webs of; saidcross bar while the-blunt top of 1 flange thereof. a A series of coil springs 14 of the :usual said invertedV forms the h mea s sub'ject'matter: of this invention; a

'; Atithose' points inth'e vcross is desired to; secure each 501: the springs 14, a

hole as'l5 ismade in eachpf,theivweb dlfl V holes are preferably arranged in'pairs, one p r f r e s n and: a e pr era ly of greater diameterfthan that of? theiwire 'vide foryflexibility in the; arrangement. of

'seriesgof holes l5 7 said cross bar at suitable intervals as may vthat springs l l may be sp acedwhen d eof which thesprings 14 are made. To pro:

be; found by experience-tobe desirable, so i sired, jnore :or lessx' closely-together, or at 1 "various and varied-"distances from the cen ter of the crossbar as may suitthe purposes of the purchaser. the [holes 15 are posed inpairsin opposite webs, that only; one f pair; of .saidholsis; is utilized for each of the a coil springs 14, and that other lt havin'g beenidecided at which points in-flthe crossbarlaspring 14 is vto *beplaced,

the end 517 {of the lowermost coil of said theend*17.;.of..the last coilis'lfpreferably w I bent upwardly, so

that whenjjthe "spring is rotatedjinto its final position throughthe si able pv ofvapertures maybe used for this purpose; r

It will beunderstood that preferably oppositely d-is- 1 holes 1 5," ,'(Figs. '1 and 2), said upwardly projecting end 17 is sprunginto selflocking it position between the V 0b 5 ionjto the removal of; said sprin 14 i h i t nt i a i i T e epressanpft eend 55 1111? id ieq- P pe axially :of an spri g: be w s webs 16, and formsan a e 52 Pa danger of rotatl again obstr.

oftl'iecross lo ail 3; l in the-manned arms; of my nventi n,

n; z fl list? under the tensile stress put and therebycauses the end'l'? to be upwardly intogfilim, Contact with the mal position "prouue s a ten end coil to thereon, pressed bottom edge 21 of the Web; Said tendency also causes the next higher coil of chaser-h3g to be drawn downwardly into oontact vith the top flange of theo'ross b'ar, liereby-tl1e spring properly 'supportedlm a posit on .ivhe'i einflonly c' itiecul massaging tl ierleof is' p'os sible and wherein t is best adapted to re 1 put there n ithoutbereiativeiy w are alabaster. j p X I a 15 win {be seen t at a magi traw 611 the sprin 14' inn'otaffect that portion of said spas-g a e smegma-e 15 (if that 6on1 d rectly above the again wanes; 'afi'ectiiig; tlielremainder of the spring below thehole v I v V ,or twisting movement of the coil sprln'g 14C merely causes the bent en'dl? to move if-at an a eoaiparaav'i emu distance in the spa seesaw" 'iyebs 11115111 the" opposite 1's reached, whereupon, further movement 1s area-wh n the era 1'77 engages theme -r I 1 I i H p be mart tli'atthat pa terns last 11 below the" holes 15 'tendsto its normal into position and thereby sures-n locking aetionby resisnn fanyslim-aw lower the end 17 and earrysaide1i'd to shot-t n"irlgli i gfs. E and? inclusive, the 'u innei or under 's'ijrraeee 7 said e It Wi'1l-hen6ted'fli'at that 11611 "spring wind-na fthrau h the" holes; 15- is'ipr'itrzlbl'y aiarsed bidwiigs I ea-ganaith ;teiiafiey in t fer'ffiflh; "s. to spring upwardly; in clb tales-aim; his under side Gillie p ea 1 f tiiag' fongra -ary messes- 555M 'n 1 6% are satiri team ve or otherinoyeiniit tlieref rfaee oi; the other Wbl It will beerfiizsgwrtia ili's o spr ng elatively; itdgnii lo'ili'.

we snangiabi at 6 the" rd bar 10; theftehdefi'cy of said" end 18 toreturn to its normal position causing said spring 14Rto.bfeoometfirmly locked in place. It

Willbe seenthat the springs are entirely self lobl'z'irfg'slnce all that is necessary to lock one of saidspringsinto place is the insertion of theme thr'ou'gh 9: 5am of holes 15 and then turning said spring While 7 depressing or ais t ses 1 115 l l l-el ffli Sw g.

claim; I s

l n i i' b hati aiiro f iy sprlng 'a'nd a-"loi'yern'iost. coll 01'1' said s'riilng having-Ia portion thereof; passed througlithe ap 'i'tiii'es Said l0 re r n crew the position assume it a me t wan lane of said i was wrrbys fiat an; of saidean above net 1 passe es the o "spring" may tibia orion would norma l through said apertures engages Saar paraea pasta axially of said spring out of the normal prisiit is in" contact.

direction 1' by 1 free n'to' anally rung ,e'fig a 2, Ina-spring i rging Webs .r i ng't r extremities of'saittwbs, a'jooil spr n 11 am thereof are maintained in *efigaaaaent or. epbafiayaisesea Banshee a pa r, of

and a and an upwardly Beat d 4. In aspri-ng seat, in

'ans' for supporting said spring, said .120 V bar-- finer "teases a n of are 7 spring to lock itself in place comprising an endin said spring passed through the aper-' tures 1n said supporting means, and forced I axially out 'of and self maintained out of, 5 the position said end would assume if free,

and in axially" sprung engagement with said supporting :means 5. The method of, causing a coil spring 7 "assume if free, p gagementwlth sa1d cross bar,

to lock itself into place comprising the in- V sertion of the end of said pair of holes in a cross bar, andthenforcing saidend' in a direction axiallyyof said spring d 'wolild normally 7 spring through a out of the. position same en ABRAHAM 'KRAKAUER. I

and into axially sprung en- 

